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ENR CTIO Blanco 4-m 2014-09-11

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Date: 
Thursday, September 11, 2014
Telescope: 
CTIO Blanco 4-m
Submitter: 
Basílio Santiago
Submitter Email: 
basilio.santiago@ufrgs.br
Observer Support: 
David James
Night Assistant: 
Alberto Alvarez
Also Present: 
Andres Plazas, Elmer Luque
Problems: 

None.

Comments: 

Louver windows and windscreen were kept closed for most of the time because of wind.

Telescope pointing offset measured at beginning of night: RA = -11.8"; Dec=1.8. Residual offsets after pointing correction: RA=-2.0"; Dec=5.0"

We notice that Y band exposures tend to have systematically larger ellipticity than other filters.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Thin Clouds
Wind: 
High
Seeing Value: 
1.30
Seeing Variability: 
0.2
Seeing Source: 
Other
Sky : 
1
2nd Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
1.10
Seeing Variability: 
0.2
Seeing Source: 
Other
Sky: 
1
3rd Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
1.10
Seeing Variability: 
0
Seeing Source: 
Other
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
1.10
Seeing Variability: 
0.2
Seeing Source: 
Other
Sky: 
1
Program: 
Proposal: 
2012B-0001
Target of Oportunity: 
No
Time Observed: 
10.25
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
Dark Energy Survey
Primary Investigator: 
Josh Frieman
Institution: 
Fermilab
Instrument: 
CTIO 4m DECam
Total Program Time: 
10.25
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2014-09-11 10.25 0.0 0.0 0.0 0.0 10.25